Looking at your profile, it seems like you have good engagement for the number of followers you have. Looking through your replies, it doesn't seem like you interact much outside of posting your own notes. Zapping, commenting, and reposting others notes is the way to connect with more people. The information exchange here is about building social and cultural capital via exchange of intellectual and experiencial capital. If you're not interacting and only posting it's a lot harder to grow. Also, the user base is still small so as I mentioned at the beginning, you are getting plenty of response to your notes relatively speaking.